Front stabilzer bar rubber bushings, (there are 4, 2 right and left, under radiator. and 1 each at right/left wheel axle bodies) when worn will squeak, even though they may look OK! Spray some W-D40 into the inboard right/left(under radiator) rubber bushings and see if it will stop squeaking, if so, there is your squeak.

My 124 squeaked from the drivers side section of the stabilizer bar for about 3 months before it started to drive me crazy! I replaced all 4 of the bushings and no more squeak! BB